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Journal articles on the topic 'Organosulfur compounds – Derivatives – Analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

El-Sawi, Emtithal A., Mona A. Hosny, and Taghreed H. El-Sayed. "Phosphorylation and Promising In-Vitro Antimicrobial Activity of Some New Organosulfur Compounds." JOURNAL OF ADVANCES IN CHEMISTRY 9, no. 2 (2013): 1965–74. http://dx.doi.org/10.24297/jac.v9i2.2352.

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During the past few decades, interest has been rapidly growing in gaining insight into the properties and transformations of thiosemicarbazide and their derivatives due to their appreciable pharmacological activities. Dimethoxy acetophenone reacts with thiosemicarbazide to afford compound (1). The product allowed to react by fusion with diethylmalonate and ethylacetoacetate to give cyclic compounds (3), (4) and (7). Their products are reacted with triphenylphosphine oxide to produce phosphorylated compounds with four and six membered rings. Some of these products display interesting biological

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2

Mulder, Ines, Torsten Krause, Tobias Sattler, et al. "Thermolytic degradation of methylmethionine and implications for its role in DMS and MeCl formation in hypersaline environments." Environmental Chemistry 12, no. 4 (2015): 415. http://dx.doi.org/10.1071/en14207.

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Environmental context Methyl chloride and dimethyl sulfide are important atmospheric trace gases, but their biogeochemical contributions to the atmosphere are not fully understood. The amino acid derivative methyl methionine has been hypothesised to be a precursor of these two atmospheric gases, especially in drying salt-lake environments. We found methyl chloride and dimethyl sulfide in salt crystals and soil samples of hypersaline lakes, suggesting that a thermal decay of methyl methionine could be one of the formation mechanisms responsible. Abstract Volatile organic halocarbons (VOXs) and

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3

Bachrach, Steven M., and Ulrike Salzner. "Topological electron density analysis of organosulfur compounds." Journal of Molecular Structure: THEOCHEM 337, no. 3 (1995): 201–7. http://dx.doi.org/10.1016/0166-1280(94)04117-b.

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4

Yin, Fangdong, Daniel Grosjean, and John H. Seinfeld. "Analysis of atmospheric photooxidation mechanisms for organosulfur compounds." Journal of Geophysical Research 91, no. D13 (1986): 14417. http://dx.doi.org/10.1029/jd091id13p14417.

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5

Anisimov, A. V., Zh B. Myltykbaeva, Zh Kairbekov, et al. "Pyridine derivatives as ligands of metal complexes for the peroxidation of organosulfur compounds." Theoretical Foundations of Chemical Engineering 51, no. 4 (2017): 563–66. http://dx.doi.org/10.1134/s0040579517040029.

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6

Chittezhath, Manesh, and Girija Kuttan. "Radioprotective Activity of Naturally Occurring Organosulfur Compounds." Tumori Journal 92, no. 2 (2006): 163–69. http://dx.doi.org/10.1177/030089160609200213.

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The radioprotective effects of naturally occurring sulfur compounds and isothiocyanates such as diallyl sulfide (DAS), diallyl disulfide (DADS), allyl methyl sulfide (AMS), allyl isothiocyanate (AITC) and phenyl isothiocyanate (PITC) have been investigated in whole body irradiated Swiss albino mice. Administration of these sulfur compounds could reduce the serum content of alkaline phosphatase (ALP), which was elevated after irradiation (23.9 ± 1.82 KA units). The elevated liver content of glutamate pyruvate transaminase (GPT) in control animals (76.2 ± 2.2 U/mL) after irradiation was signific

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7

Muttaqin, Fauzan Zein, Taufik Muhammad Fakih, and Hubbi Nashrullah Muhammad. "MOLECULAR DOCKING, MOLECULAR DYNAMICS, AND IN SILICO TOXICITY PREDICTION STUDIES OF COUMARIN, N-OXALYLGLYCINE, ORGANOSELENIUM, ORGANOSULFUR, AND PYRIDINE DERIVATIVES AS HISTONE LYSINE DEMETHYLASE INHIBITORS." Asian Journal of Pharmaceutical and Clinical Research 10, no. 12 (2017): 212. http://dx.doi.org/10.22159/ajpcr.2017.v10i12.19348.

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Objective: Prostate cancer is the second most common cancer in men. One of the efforts in the treatment of prostate cancer is by inhibiting histone lysine demethylase. Derivative compounds of coumarine, N-oxalylglycine, organoselenium, organosulfur, and pyridine have been reported to be active against two types of histone lysine demethylase (KDM) enzymes, KDM4E and KDM5B. This study aims to study the interactions of these derivatives with KDM.Methods: In this study, we performed computational studies, including molecular docking and molecular dynamics (MDs) simulations, and toxicity prediction

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8

Schepetkin, Igor A., Liliya N. Kirpotina, Andrei I. Khlebnikov, Narayanaganesh Balasubramanian, and Mark T. Quinn. "Neutrophil Immunomodulatory Activity of Natural Organosulfur Compounds." Molecules 24, no. 9 (2019): 1809. http://dx.doi.org/10.3390/molecules24091809.

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Organosulfur compounds are bioactive components of garlic essential oil (EO), mustard oil, Ferula EOs, asafoetida, and other plant and food extracts. Traditionally, garlic (Allium sativum) is used to boost the immune system; however, the mechanisms involved in the putative immunomodulatory effects of garlic are unknown. We investigated the effects of garlic EO and 22 organosulfur compounds on human neutrophil responses. Garlic EO, allyl propyl disulfide, dipropyl disulfide, diallyl disulfide, and allyl isothiocyanate (AITC) directly activated Ca2+ flux in neutrophils, with the most potent bein

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9

IWASAKI, FUJIKO. "Vision for the application of electron density analysis. 8. Hypervalent organosulfur compounds." Nihon Kessho Gakkaishi 30, no. 2 (1988): 169–70. http://dx.doi.org/10.5940/jcrsj.30.169.

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10

Bock, H., B. Hierholzer, and P. Rittmeyer. "Radikalionen, 81. ENDOR-spektroskopische Untersuchungen an Radikalkationen aromatischer Organoschwefel-Verbindungen / Radical Ions, 81. ENDOR Spectroscopic Investigations of Radical Cations of Aromatic Organosulfur Compounds." Zeitschrift für Naturforschung B 44, no. 2 (1989): 187–204. http://dx.doi.org/10.1515/znb-1989-0216.

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Conditions for ENDOR measurem ents of organosulfur radical cations are discussed and tested. The one electron oxidation of a variety of aromatic sulfur com pounds comprising benzene-1,2-dithiole, 1,4-dithiine, thianthrene and diphenylsulfide derivatives as well as 33S isotope-marked bis(2,5-dimethoxyphenyl)disulfide is accomplished using the oxygen-free, powerful and selective AlCl3/H2CCl2 reagent. Partly with substantial structural changes, paramagnetic M⊕ species of 1,2-benzodithiete, 1,4-dithiine, thianthrene and diphenyl sulfide result. Their temperature-dependent ENDOR signal patterns pro

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11

Naz, Sumaira, Muhammad Zahoor, Muhammad Naveed Umar, Saad Alghamdi, Muhammad Umar Khayam Sahibzada, and Wasim UlBari. "Synthesis, characterization, and pharmacological evaluation of thiourea derivatives." Open Chemistry 18, no. 1 (2020): 764–77. http://dx.doi.org/10.1515/chem-2020-0139.

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AbstractThioureas and their derivatives are organosulfur compounds having applications in numerous fields such as organic synthesis and pharmaceutical industries. Symmetric thiourea derivatives were synthesized by the reaction of various anilines with CS2. The synthesized compounds were characterized using the UV-visible and nuclear magnetic resonance (NMR) spectroscopic techniques. The compounds were screened for in vitro inhibition of α-amylase, α-glucosidase, acetylcholinesterase (AChE), and butyrylcholinesterase (BuChE) enzymes and for their antibacterial and antioxidant potentials. These

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12

Gularte, Matheus S., João M. Anghinoni, Laura Abenante, et al. "Synthesis of chitosan derivatives with organoselenium and organosulfur compounds: Characterization, antimicrobial properties and application as biomaterials." Carbohydrate Polymers 219 (September 2019): 240–50. http://dx.doi.org/10.1016/j.carbpol.2019.05.040.

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13

Gamelas, José A. F., Sofia M. Rebola, Margarita G. Evtyugina, Valdemar I. Esteves, and Dmitry V. Evtuguin. "Purification of pulp mill condensates by an adsorptive process on activated carbon." Holzforschung 73, no. 6 (2019): 589–97. http://dx.doi.org/10.1515/hf-2018-0125.

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Abstract In order to close the water cycle in pulp mills with condensates instead of fresh water, the malodorous/hazardous volatile compounds and colored substances have to be removed by appropriate efficient methods. In the present work, the condensate from the evaporation of black liquor (BL) from a kraft mill was purified by a batch adsorptive process by means of commercial activated carbon (AC). The effluent was found to contain a wide range of aromatic and organosulfur volatile compounds, including toluene, ethylguaicol, syringaldehyde, dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS

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14

Aguiar, Joselin, João L. Gonçalves, Vera L. Alves, and José S. Câmara. "Relationship between Volatile Composition and Bioactive Potential of Vegetables and Fruits of Regular Consumption—An Integrative Approach." Molecules 26, no. 12 (2021): 3653. http://dx.doi.org/10.3390/molecules26123653.

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In recent years, there has been a growing interest in studying and exploring the potential health benefits of foods, mainly from vegetables and fruits from regular intake. The presence of secondary metabolites, namely polyphenols, carotenoids and terpenes, in certain food matrices seems to contribute to their functional properties, expressed through an increased prevention in the development of certain chronic diseases, namely coronary heart diseases, neurodegenerative diseases, cancer and diabetes. However, some foods’ volatile secondary metabolites also present important bioactive properties

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15

Lu, Xiaonan, Barbara A. Rasco, Jamie M. F. Jabal, D. Eric Aston, Mengshi Lin, and Michael E. Konkel. "Investigating Antibacterial Effects of Garlic (Allium sativum) Concentrate and Garlic-Derived Organosulfur Compounds on Campylobacter jejuni by Using Fourier Transform Infrared Spectroscopy, Raman Spectroscopy, and Electron Microscopy." Applied and Environmental Microbiology 77, no. 15 (2011): 5257–69. http://dx.doi.org/10.1128/aem.02845-10.

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ABSTRACTFourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy were used to study the cell injury and inactivation ofCampylobacter jejunifrom exposure to antioxidants from garlic.C. jejuniwas treated with various concentrations of garlic concentrate and garlic-derived organosulfur compounds in growth media and saline at 4, 22, and 35°C. The antimicrobial activities of the diallyl sulfides increased with the number of sulfur atoms (diallyl sulfide < diallyl disulfide < diallyl trisulfide). FT-IR spectroscopy confirmed that organosulfur compounds are responsible for the sub

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16

Ramirez, Daniela Andrea, Eduardo Marchevsky, Juan Maria Luco, and Alejandra Camargo. "Quantitative structure-activity relationship to elucidate human CYP2A6 inhibition by organosulfur compounds." ADMET and DMPK 7, no. 3 (2019): 196–209. http://dx.doi.org/10.5599/admet.678.

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CYP2A6 is a human enzyme responsible for the metabolic elimination of nicotine, and it is also involved in the activation of procarcinogenic nitrosamines, especially those present in tobacco smoke. Several investigations have reported that reducing this enzyme activity may contribute to anti-smoking therapy as well as reducing the risk of promutagens in the body. For these reasons, several authors investigate selective inhibitors molecules toward this enzyme. The aim of this study was to evaluate the interactions between a set of organosulfur compounds and the CYP2A6 enzyme by a quantitative s

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17

Bock, Hans, та Sven Holl. "Wechselwirkungen in Molekülkristallen, 167 [1, 2]. Kristallzüchtung und Strukturbestimmung von σ-Donator/Akzeptor- Komplexen zwischen 1,4-Dioxan und den Polyiod-Molekülen I2,I2C=CI2, (IC)4S sowie (IC)4NR (R = H, CH3) / Interaction in Molecular Crystals, 167 [1, 2]. C rystallization and Structure Determination of σ -Donor/Acceptor Complexes between 1,4-Dioxane and the Polyiodine Molecules I2,I2C=CI2, (IC)4S and (IC)4NR (R = H, CH3)". Zeitschrift für Naturforschung B 56, № 2 (2001): 111–21. http://dx.doi.org/10.1515/znb-2001-0201.

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Abstract With 1,4-dioxane as the constant donor, five new donor/acceptor complexes with the polyiodine compounds I-I, I2C=CI2, tetraiodothiophene and two tetraiodopyrrole derivatives could be crystallized and their structures determined despite their decomposition in air. They provide interesting facets for selforganisation on crystallization: The 1,4-dioxane addition causes at best small structural changes of the polyiodine compounds. All adducts crystallize in chains of alternating donors and acceptors, which also staple separatedly. The direction of the contacts O···I depends on the incorpo

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18

Huang, Zhicheng, Xiaoyu Lei, Xi Feng, et al. "Identification of a Heat-Inducible Element of Cysteine Desulfurase Gene Promoter in Lentinula edodes." Molecules 24, no. 12 (2019): 2223. http://dx.doi.org/10.3390/molecules24122223.

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Volatile organosulfur compounds are the main components that contribute to the unique aroma of dried Lentinula edodes. They are mainly generated during the hot-air drying process, and cysteine desulfurase is the key enzyme in this process. Temperature may be an essential factor of volatile organosulfur compound production by influencing the expression of the cysteine desulfurase gene. In this study, the promoter sequence of the cysteine desulfurase gene (pCS) was cloned and analyzed using bioinformatics tools. A series of 5′deletion fragments and site-directed mutations of pCS were constructed

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19

Moreno-Ortega, Alicia, Gema Pereira-Caro, José Luis Ordóñez, Rafael Moreno-Rojas, Víctor Ortíz-Somovilla, and José Manuel Moreno-Rojas. "Bioaccessibility of Bioactive Compounds of ‘Fresh Garlic’ and ‘Black Garlic’ through In Vitro Gastrointestinal Digestion." Foods 9, no. 11 (2020): 1582. http://dx.doi.org/10.3390/foods9111582.

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Numerous studies have reported health benefits associated with the consumption of fresh and black garlic, which are characterized by the presence of polyphenols and organosulfur compounds (OS). This study aims to analyze the bioaccessibility of the bioactive compounds in fresh and black garlic after in vitro gastrointestinal digestion by monitoring the individual profile of these compounds by ultra-high-performance liquid chromatography coupled to high-resolution mass spectrometry (UHPLC-HRMS). Polyphenols decreased from the beginning of the digestive process, is mainly affected during intesti

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20

Gómez-Paz, Olaya, Rosa Carballo, Ana Belén Lago, and Ezequiel M. Vázquez-López. "Metallosupramolecular Compounds Based on Copper(II/I) Chloride and Two Bis-Tetrazole Organosulfur Ligands." Chemistry 2, no. 1 (2020): 33–49. http://dx.doi.org/10.3390/chemistry2010005.

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The present work assesses the ability of two flexible bis-tetrazole organosulfur ligands to build up different metallosupramolecular compounds based on the analysis of the different supramolecular interactions. The reaction of copper(II) chloride dihydrate with the N,N’-donor dithioether ligands bis(1-methyl-1H-tetrazole-5-ylthio)methane (BMTTM) and 1,2-bis(1-methyl-1H-tetrazole-5-ylthio)ethane (BMTTE) was investigated using different synthetic methods. Four compounds have been obtained as single crystals: two pseudopolymorphic 1D Cu(II) coordination polymers with the ligand BMTTM, a 2D Cu(II)

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21

Schwan, Adrian L., Denis Brillon, and Robert Dufault. "Synthesis, reactions, and interconversions of some 2-(trimethylsilyl)ethyl substituted sulfur compounds." Canadian Journal of Chemistry 72, no. 2 (1994): 325–33. http://dx.doi.org/10.1139/v94-050.

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In an effort to probe the compatibility of the 2-(trimethylsilyl)ethyl sulfur moiety with standard organosulfur transformations, several 2-(trimethylsilyl)ethanethiol derivatives have been prepared in excellent yield. Thus 2-(trimethylsilyl)ethanethiol (1) and 2-(trimethylsilyl)ethyl disulfide (4) and its corresponding thiosulfinate 9 and thiosulfonate 10 have been synthesized. One method of formation of 4 involves the breakdown of a 1-(trimethylsilyl)ethyl unit while the 2-(trimethylsilyl)ethyl fragment survives. Oxidation of 4 or 9 to 10 did not proceed efficiently with common reagents, but

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22

Knoblauch, Stephan, H. Fred Koch, Catherine Polydore, and D. Max Roundhill. "A computational approach to seeking methylmercury(II) thiolate calix[4]arene hosts for both octasulfur and organosulfur compounds as guests." Canadian Journal of Chemistry 79, no. 5-6 (2001): 977–82. http://dx.doi.org/10.1139/v00-197.

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Calculations have been carried out on the conformational preferences of calix[4]arene thiols and their methylmercury(II) derivatives. Calculations have also been carried out on hostguest combinations of methylmercury(II) ethanethiolate calix[4]arenes and 1,4-dithiacyclohexane, octasulfur, thiacyclopropane, and thiophene. For the 1,4-dithiacyclohexane, thiacyclopropane, and thiophene guests, calculations have been carried out for both 1:1 and 1:4 ratios of the methylmercury(II) ethanethiolate calix[4]arene to the sulfur containing guests. For octasulfur only the 1:1 hostguest ratio has been c

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23

Kim, Sunyoung, So-Lim Park, Sanghee Lee, So-Young Lee, Sungho Ko, and Miyoung Yoo. "UPLC/ESI-MS/MS analysis of compositional changes for organosulfur compounds in garlic (Allium sativum L.) during fermentation." Food Chemistry 211 (November 2016): 555–59. http://dx.doi.org/10.1016/j.foodchem.2016.05.102.

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24

Schnitzler, E., M. Kobelnik, G. F. C. Sotelo, G. Bannach, and M. Ionashiro. "Thermoanalytical study of purine derivatives compounds." Eclética Química 29, no. 1 (2004): 71–78. http://dx.doi.org/10.1590/s0100-46702004000100009.

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Thermal methods of analysis are now used in a very large range of scientific investigations. In this work simultaneous thermogravimetry-differential thermal analysis (TG-DTA), X-Ray powder diffractometry and infrared spectroscopy were used to study the derivative compounds of purine, i. e. aminophylline, theophylline, caffeine and uric acid. The results led to informations about the thermal stability and thermal decomposition of these compounds.

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25

Gong, Gui Zhen, Xian Yong Wei, Shang Li Wang, Ting Yao, Shao Peng Liu, and Zhi Min Zong. "Organosulfur Compounds in CS₂ Extractable-Fractions from Four Chinese Coals Oxidized with NaOCl." Advanced Materials Research 236-238 (May 2011): 888–91. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.888.

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Four Chinese coals were oxidized with NaOCl aqueous solution under mild conditions. The reaction mixture was extracted with diethyl ether, carbon disulfide, petroleum ether, acetic ester and benzene sequentially. A series of organosulfur compounds (OSCs) were identified in the carbon disulfide fraction from the oxidized coals by GC/MS analysis but no OSCs were detected from other fractions except for 3 thiophene polycarboxylic acids found in ether-extraction. Some new types of sulfur function groups were also detected in the coal oxidation products which were not previously reported from coals

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26

Bannwart, Linda M., Pascal S. Rieder, and Marcel Mayor. "2-(3-Cyanopropyldimethylsilyl)ethyl as a Polar Sulfur Protecting Group." Synthesis 51, no. 22 (2019): 4153–64. http://dx.doi.org/10.1055/s-0039-1690184.

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Organosulfur compounds are ubiquitous in synthetic chemistry, biology and materials chemistry. The reactivity of free sulfhydryls requires their masking in many synthetic strategies. To facilitate the isolation of protected thiols by chromatography, we propose 2-(3-cyanopropyldimethylsilyl)ethyl as a polar protecting group analogue of 2-(trimethylsilyl)ethyl. The masked thiophenol is obtained in two synthetically complementing ways. Either an existing thiophenol is protected, or the protected thiol group is introduced by a cross-coupling reaction. In both cases the required reagents are readil

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27

Baluja, Shipra, and Nikunj Kachhadia. "Thermal Analysis of some Imidazolinone Derivatives." International Letters of Chemistry, Physics and Astronomy 44 (January 2015): 124–29. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.44.124.

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Thermal analysis of some imidazolinone derivatives derived from 1, N-phenyl-3-p-nitrophenyl-4-formyl pyrazole, have been carried out by TGA technique. From these thermograms, various kinetic parameters such as order of degradation (n), energy of activation (E), frequency factor (A) and entropy change (∆S) have been evaluated. Further, thermal stability of imidazolinone derivatives have been determined, which is found to depend on the type of substituent present in the compounds.

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Bakibaev, A. A., V. S. Malkov, D. A. Kurgachev, and O. A. Kotelnikov. "Methods of analysis of glycoluril and its derivatives." Bulletin of the Karaganda University. "Chemistry" series 100, no. 4 (2020): 5–34. http://dx.doi.org/10.31489/2020ch4/5-34.

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The present work provides the literature data generalization concerning analysis of glycoluril, its derivatives and related compounds that allows obtaining information about the structure and properties of these com-pounds. Basic methods for analysis of glycoluril and substances on the basis thereof are considered, ad-vantages and disadvantages of these methods are described. The generalized results of the methods of analy-sis of glycoluril and its derivatives show that the majority of carried studies are focused on the revealing of purity and identification of related impurities for compounds

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29

Jang, Gwang-Ju, Mi Jeong Sung, Haeng Jeon Hur, et al. "Metabolomics Analysis of the Lipid-Regulating Effect of Allium hookeri in a Hamster Model of High-Fat Diet-Induced Hyperlipidemia by UPLC/ESI-Q-TOF Mass Spectrometry." Evidence-Based Complementary and Alternative Medicine 2018 (September 27, 2018): 1–8. http://dx.doi.org/10.1155/2018/5659174.

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Hyperlipidemia is a risk factor for atherosclerotic cardiovascular disease and is a major public health concern. Allium hookeri (AH) is an Allium species containing high levels of bioactive organosulfur compounds such as methiin and cycloalliin. AH exerts hypolipidemic effects in animals fed a high-fat diet. However, there exists little information on the mechanisms underlying these effects. To address this issue, we used a metabolomic approach based on ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry to identify factors mediating the lipid-lowering effects o

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Baluja, Shipra, Rahul Bhalodia, Ravi Gajera, Mehul Bhatt, and Kapil Bhesaniya. "Thermal analysis of some novel pyrimidine derivatives." Revista Colombiana de Ciencias Químico-Farmacéuticas 48, no. 2 (2019): 436–54. http://dx.doi.org/10.15446/rcciquifa.v48n2.82722.

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Some new pyrimidine derivatives have been synthesized and their decomposition characteristics have been studied by thermogravimetric and differential scanning calorimetric analysis. The thermal stability and some kinetics parameters of decomposition were evaluated from thermograms. It is observed that depending upon the structure, substitutions, thermal stability and decomposition kinetics varies in different compounds.

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Aggarwal, Natasha N., B. C. Revanasiddappa, Banylla Felicity, Vijay Kumar, and Hemanth Kumar. "SYNTHESIS, IN SILICO ANALYSIS AND ANTICONVULSANT ACTIVITY OF NOVEL PYRIMIDINE DERIVATIVES." Indian Drugs 58, no. 05 (2021): 21–29. http://dx.doi.org/10.53879/id.58.05.12570.

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In this present study, a novel series of chalcones (C1-10) were synthesized by reacting 4-nitro acetophenone and various substituted aromatic aldehydes in an alcohol medium. The title compounds, pyrimidine derivatives (PD1-10), were obtained by the cyclization of chalcones (C1-10) with guanidine carbonate in an alcoholic medium. Each of the newly synthesized compounds was structurally assigned in accordance with FT-IR, 1 H-NMR and mass spectral data. All the synthesized compounds were subjected to in silico analysis among which, some of the synthesized compounds were chosen and evaluated for i

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32

SATO, Soei, Chikakiyo NAGATA, and Shigeyuki TANAKA. "Graphic representation of 13C-nuclear magnetic resonance chemical shifts of oxygen-containing organosulfur compounds and its application to the structural analysis." Bunseki kagaku 34, no. 7 (1985): 392–98. http://dx.doi.org/10.2116/bunsekikagaku.34.7_392.

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33

Block, Eric, Robert B. Cody, A. John Dane, Robert Sheridan, Abith Vattekkatte, and Kai Wang. "Allium chemistry: Use of new instrumental techniques to “see” reactive organosulfur species formed upon crushing garlic and onion." Pure and Applied Chemistry 82, no. 3 (2010): 535–39. http://dx.doi.org/10.1351/pac-con-09-08-12.

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Three different instrumental methods have been used to examine the organosulfur chemistry of intact and cut garlic and onions: X-ray fluorescence spectroscopic imaging (XFS), direct analysis in real time (DART) mass spec-trometry, and ultra-performance liquid chromatography-(Ag+)-coordination ion spray mass spectrometry (UPLC–(Ag+)CIS–MS). The first technique has been used to map the location of different chemical forms of sulfur in intact and damaged onion cells, the second technique, to identify the reactive, volatile sulfur compounds formed on cutting the plants, and the third technique, to

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CHEN, ZHENYU, HONGYU CEN, LISHA WEI, YAMIN CAO, and XINGPENG GUO. "INHIBITORY ACTION OF GARLIC EXTRACT IN THE CORROSION OF COPPER UNDER THIN ELECTROLYTE LAYERS." Surface Review and Letters 26, no. 01 (2019): 1850128. http://dx.doi.org/10.1142/s0218625x18501287.

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The inhibition effects of garlic extract on copper corrosion under a thin electrolyte layer (TEL) were investigated using weight-loss measurements, electrochemical methods and surface analysis. Results showed that the volatile organosulfur compounds of garlic extract, such as diallyl trisulfide and di-2-propenyl disulfide, among others, could adsorb on the surface of copper and have a significant inhibitory effect on copper corrosion. Garlic extract acted as a mixed-type inhibitor for copper under TEL. Surface analyses, such as scanning electron microscopy (SEM), energy-dispersive spectroscopy

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Shapekova, N. L., and R. Z. Safarov. "Computer analysis of the antineoplastic activity of betulin derivatives." BULLETIN of L.N. Gumilyov Eurasian National University. BIOSCIENCE Series 132, no. 3 (2020): 57–68. http://dx.doi.org/10.32523/2616-7034-2020-132-3-57-68.

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The paper provides an overview of the use of various betulin derivatives. There are represented conclusions of in-silico research of betulin, betulinic acid, betulinic diacetate, allobetulinol. There has been used OSIRIS software for in silico analysis PASS, Molinspiration. Obtained results of the study show that after summarizing of all forecasts betulin and betulinic acid are potential compounds for getting more efficient and active products for producing of antitumor pharmaceuticals. Betulin diacetate is proper according to various theoretic terms but has a high probability to be an irritan

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Popovici, Corina, Dana Ortansa Dorohoi, Valeriu Sunel, and Corina Cheptea. "Synthesis and Spectral Analysis of New Antitumor Compounds with Benzimidazole Structure." Revista de Chimie 69, no. 9 (2018): 2581–84. http://dx.doi.org/10.37358/rc.18.9.6582.

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Amidic compounds, derivatives of the 5-nitro-benzimidazolyl-2-mercapto-acetic acid were obtained in order to get new cytostatic substances. Two azotyperitic derivatives were obtained by the grafting of the di-(b-chloroethyl)-amine group on molecules of two of the amidic compounds. The NMR and FT-IR spectra confirmed the structure of the new compounds. The mitodepresive action of the new compounds has been tested on root meristems of Lepidiumm sativum L.

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Perraud, Véronique, Simone Meinardi, Donald R. Blake, and Barbara J. Finlayson-Pitts. "Challenges associated with the sampling and analysis of organosulfur compounds in air using real-time PTR-ToF-MS and offline GC-FID." Atmospheric Measurement Techniques 9, no. 3 (2016): 1325–40. http://dx.doi.org/10.5194/amt-9-1325-2016.

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Abstract. Organosulfur compounds (OSCs) are naturally emitted via various processes involving phytoplankton and algae in marine regions, from animal metabolism, and from biomass decomposition inland. These compounds are malodorant and reactive. Their oxidation to methanesulfonic and sulfuric acids leads to the formation and growth of atmospheric particles, which are known to influence clouds and climate, atmospheric chemical processes. In addition, particles in air have been linked to negative impacts on visibility and human health. Accurate measurements of the OSC precursors are thus essentia

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Hadanu, Ruslin, Sabirin Mastjeh, Mustofa Mustofa, Eti Nurwening Sholikhah, Mahardika Agus Wijayanti, and Iqmal Tahir. "QUANTITAVE STRUCTURE-ACTIVITY RELATIONSHIP ANALYSIS (QSAR) OF ANTIMALARIAL 1,10-PHENANTHROLINE DERIVATIVES COMPOUNDS." Indonesian Journal of Chemistry 7, no. 1 (2010): 72–77. http://dx.doi.org/10.22146/ijc.21716.

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Quantitative Electronic Structure-Activity Relationship (QSAR) analysis of a series of 1,10-phenanthroline derivatives as antiplasmodial compounds have been conducted using atomic net charges (q), dipole moment (μ) ELUMO, EHOMO, polarizability (α) and log P as the descriptors. The descriptors were obtained from computational chemistry method using semi-empirical PM3. Antiplasmodial activities were taken as the activity of the drugs against chloroquine-resistant Plasmodium falciparum FCR3 strain and are presented as the value of ln (1/IC50) where IC50 is an effective concentration inhibiting 50

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Zong, Jacky, and Danik M. Martirosyan. "Anticancer effects of garlic and garlic-derived bioactive compounds and its potential status as functional food." Bioactive Compounds in Health and Disease 1, no. 2 (2018): 16. http://dx.doi.org/10.31989/bchd.v1i2.530.

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Background: Garlic, or Allium savitum, has long been used to treat various diseases, including cancer. The anticancer effects of garlic are linked to the several garlic-derived organosulfur compounds, such as allicin, ajoene, DAS, DADS, DATS, and SAMC. Animal and in vitro studies have demonstrated that garlic bioactive compounds may prevent cancer through mechanisms such as inducing cell cycle arrest, promoting apoptosis, and inhibiting angiogenesis in different cancer cells. Observational studies, including case-control and cohort studies, have been conducted to confirm the protective effect

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Perraud, V., S. Meinardi, D. R. Blake, and B. J. Finlayson-Pitts. "Challenges associated with the sampling and analysis of organosulfur compounds in air using real-time PTR-ToF-MS and off-line GC-FID." Atmospheric Measurement Techniques Discussions 8, no. 12 (2015): 13157–97. http://dx.doi.org/10.5194/amtd-8-13157-2015.

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Abstract. Organosulfur compounds (OSC) are naturally emitted via various processes involving phytoplankton and algae in marine regions, from animal metabolism and from biomass decomposition inland. These compounds are malodorant and reactive. Their oxidation to methanesulfonic and sulfuric acids leads to the formation and growth of atmospheric particles, which are known to have negative effects on visibility, climate and human health. In order to predict particle formation events, accurate measurements of the OSC precursors are essential. Here, two different approaches, proton-transfer reactio

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Sugawara, Masayuki, Gopit R. Shah, Michael J. Sadowsky, et al. "Expression and Functional Roles of Bradyrhizobium japonicum Genes Involved in the Utilization of Inorganic and Organic Sulfur Compounds in Free-Living and Symbiotic Conditions." Molecular Plant-Microbe Interactions® 24, no. 4 (2011): 451–57. http://dx.doi.org/10.1094/mpmi-08-10-0184.

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Strains of Bradyrhizobium spp. form nitrogen-fixing symbioses with many legumes, including soybean. Although inorganic sulfur is preferred by bacteria in laboratory conditions, sulfur in agricultural soil is mainly present as sulfonates and sulfur esters. Here, we show that Bradyrhizobium japonicum and B. elkanii strains were able to utilize sulfate, cysteine, sulfonates, and sulfur-ester compounds as sole sulfur sources for growth. Expression and functional analysis revealed that two sets of gene clusters (bll6449 to bll6455 or bll7007 to bll7011) are important for utilization of sulfonates s

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Stratienko, Elena N., Natalia P. Katunina, Fatima N. Tseeva, et al. "COMPARATIVE ANALYSIS OF ACTOPROTECTIVE PROPERTIES OF NEW CHEMICAL COMPOUNDS." Kuban Scientific Medical Bulletin 26, no. 2 (2019): 122–29. http://dx.doi.org/10.25207/1608-6228-2019-26-2-122-129.

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Aim. This study was aimed at searching and investigating new substances among phenylethyl derivatives of 3-hydroxypyridine, which exhibit a high actoprotective activity under the conditions of normoxia and acute hypobaric hypoxia.Materials and methods. New compounds of phenylethyl derivatives of 3-hydroxypyridine under the SC code (n = 23) were investigated in comparison with bemethyl and bromantane. The actoprotective activity of new compounds was assessed in experimental animals using a treadmill running test under the conditions of normoxia and acute hypobaric hypoxia. The studied chemical

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Zeleke, Digafie, Rajalakshmanan Eswaramoorthy, Zerihun Belay, and Yadessa Melaku. "Synthesis and Antibacterial, Antioxidant, and Molecular Docking Analysis of Some Novel Quinoline Derivatives." Journal of Chemistry 2020 (July 24, 2020): 1–16. http://dx.doi.org/10.1155/2020/1324096.

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2-Chloroquinoline-3-carbaldehyde and 2-chloro-8-methylquinoline-3-carbaldehyde derivatives were synthesized through Vilsmeier formulation of acetanilide and N-(o-tolyl)acetamide. Aromatic nucleophilic substitution reaction was used to introduce various nucleophiles in place of chlorine under different reaction conditions. The carbaldehyde group was oxidized by permanganate method and reduced with metallic sodium in methanol and ethanol. The synthesized compounds were characterized by UV-Vis, IR, and NMR. The antibacterial activity of the synthesized compounds was screened against two Gram-posi

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Rastija, Vesna, Maja Molnar, Tena Siladi, and Vijay Hariram Masand. "QSAR Analysis for Antioxidant Activity of Dipicolinic Acid Derivatives." Combinatorial Chemistry & High Throughput Screening 21, no. 3 (2018): 204–14. http://dx.doi.org/10.2174/1386207321666180213092352.

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Aims and Objectives: The aim of this study was to derive robust and reliable QSAR models for clarification and prediction of antioxidant activity of 43 heterocyclic and Schiff bases dipicolinic acid derivatives. According to the best obtained QSAR model, structures of new compounds with possible great activities should be proposed. Methods: Molecular descriptors were calculated by DRAGON and ADMEWORKS from optimized molecular structure and two algorithms were used for creating the training and test sets in both set of descriptors. Regression analysis and validation of models were performed usi

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Kholin, Andrey Yu, Svetlana V. Kurbatova, and Margarita N. Zemtsova. "Comparative analysis of the various structures quinoline derivatives retention under RP HPLC." Butlerov Communications 63, no. 8 (2020): 31–39. http://dx.doi.org/10.37952/roi-jbc-01/20-63-8-31.

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The study results of the structure and physicochemical parameters effect of various quinoline derivatives on their retention under conditions of reversed-phase high-performance liquid chromatography are presented. It is shown that since the establishment of the relationship between the structure of a substance and its properties is still one of the most important problems of modern chemistry and materials science, chromatography is a very convenient and effective method for obtaining the information necessary for this. To establish the relationship between the structure and sorption characteri

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Hirani, Jayanti B., Mayank Pandya, and Suresh B. Koradiya. "Synthesis, Spectral Analysis and Antibacterial Screening of Tetracyclic Thiazepine Based Pyrazole Derivatives." Asian Journal of Organic & Medicinal Chemistry 5, no. 4 (2020): 283–88. http://dx.doi.org/10.14233/ajomc.2020.ajomc-p281.

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A series of tetracyclic thiazepine based pyrazoles (6a-j) have been synthesized and evaluated for antibacterial and antifungal activities. The newly synthesized compounds have been characterized by IR, 1H & 13C NMR, mass and elemental analyses. Compounds 6b (2- OCH3) and 6c (4-OCH3) have shown promising antibacterial, and 6g (3-NO2), 6f (2-NO2) and 6d (3,4-diOCH3) exhibited excellent an antifungal activity against standard drugs.

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Szewczuk, Nicolas Alejandro, Pablo Román Duchowicz, and Alicia Beatriz Pomilio. "QSAR Analysis for the Inhibition of the Mutagenic Activity by Anthocyanin Derivatives." International Journal of Quantitative Structure-Property Relationships 5, no. 4 (2020): 69–82. http://dx.doi.org/10.4018/ijqspr.20201001.oa1.

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Flavonoid compounds modulate the cytochrome P450 3A4 enzyme activity and inhibit the mutagenic activity of mammalian cells, preventing carcinogen activation and cellular DNA damage. In this work, the quantitative structure-activity relationships (QSAR) theory is applied to predict the cytochrome P450 3A4 inhibition constant by anthocyanin derivatives. Different freely available software calculates 102,260 non-conformational molecular descriptors. A training set of 12 compounds is used to calibrate the best univariable linear regression models, while a test set of 4 compounds is used to explore

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Mudasir, Mudasir, Yari Mukti Wibowo, and Harno Dwi Pranowo. "Design of New Potent Insecticides of Organophosphate Derivatives Based on QSAR Analysis." Indonesian Journal of Chemistry 13, no. 1 (2013): 86–93. http://dx.doi.org/10.22146/ijc.21331.

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Design of new potent insecticide compounds of organophosphate derivatives based on QSAR (Quantitative Structure-Activity Relationship) analytical model has been conducted. Organophosphate derivative compounds and their activities were obtained from the literature. Computational modeling of the structure of organophosphate derivative compounds and calculation of their QSAR descriptors have been done by AM1 (Austin Model 1) method. The best QSAR model was selected from the QSAR models that used only electronic descriptors and from those using both electronic and molecular descriptors. The best Q

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Xuan, Qi-Cun, Rong Huang, You-Wei Chen, et al. "Cyclonerol Derivatives from Trichoderma longibrachiatum YM311505." Natural Product Communications 9, no. 3 (2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900307.

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A new sesquiterpene, 10,11-dihydrocyclonerotriol (1), together with two known compounds, catenioblin C (2) and sohirnone A (3), were isolated from Trichoderma longibrachiatum YM311505, an endophytic fungus of Azadirachta indica. Their structures were characterized and identified by spectral analysis. Compounds 1–3 exhibited antifungal activities against Pyricularia oryzae and Candida albicans.

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Kahnert, Antje, Paul Vermeij, Claudia Wietek, Peter James, Thomas Leisinger, and Michael A. Kertesz. "The ssu Locus Plays a Key Role in Organosulfur Metabolism in Pseudomonas putidaS-313." Journal of Bacteriology 182, no. 10 (2000): 2869–78. http://dx.doi.org/10.1128/jb.182.10.2869-2878.2000.

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ABSTRACT Pseudomonas putida S-313 can utilize a broad range of aromatic sulfonates as sulfur sources for growth in sulfate-free minimal medium. The sulfonates are cleaved monooxygenolytically to yield the corresponding phenols. miniTn5 mutants of strain S-313 which were no longer able to desulfurize arylsulfonates were isolated and were found to carry transposon insertions in the ssuEADCBF operon, which contained genes for an ATP-binding cassette-type transporter (ssuABC), a two-component reduced flavin mononucleotide-dependent monooxygenase (ssuED) closely related to the Escherichia coli alka

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